Which color is NOT part of the police code system?

The color black is not part of the traditional police code system. Police codes, often referred to as colors in various contexts, typically utilize colors such as red, blue, and yellow to represent specific codes or alerts. For example, red might be associated with emergencies, blue with police presence or distress signals, and yellow can denote caution or alerts. The inclusion of these colors in the code system provides a rapid and intuitive way for officers and dispatchers to communicate critical information during emergencies or while on duty. In contrast, black is not conventionally associated with any specific police code or message within this system, which makes it the correct response in this scenario.